Definition of Extent
Amount; scope; range; magnitude.
In old English law, a writ of execution issuing from the exchequer upon a debt due the crown, or upon a debt due a private person, if upon recognizance or statute merchant or staple, by which the sheriff was directed to appraise the debtor’s lands, and, instead of selling them, to set them off to the creditor for a term during which the rental will satisfy the judgment. It was so called because the sheriff was to cause the lands to be appraised at their full extended value before he delivers them to the plaintiff. The term was at one time used in the various states of the United States to denote writs which give the creditor possession of the debtor’s lands for a limited time till the debt be paid.
That's the definition of Extent in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.